from heapq import *
def main():
    n = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    r = 0
    ans = 0
    hq0 = []
    hq0_ = []
    hq1 = []
    hq1_ = []
    for l in range(n):
        while l == r or (r < n and hq0[0] > -A[r]-B[r] and hq1[0] > -A[r]+B[r]):
            heappush(hq0, -A[r]-B[r])
            heappush(hq1, -A[r]+B[r])
            r += 1
        ans += r-l-1
        heappush(hq0_, -A[l]-B[l])
        heappush(hq1_, -A[l]+B[l])
        while hq0_ and hq0[0] == hq0_[0]:
            heappop(hq0)
            heappop(hq0_)
        while hq1_ and hq1[0] == hq1_[0]:
            heappop(hq1)
            heappop(hq1_)
    return ans

print(main())